Question:

Heating an aqueous solution of aluminium chloride to dryness will give

Updated On: Jul 6, 2022
  • $\ce{Al(OH) Cl_2}$
  • $\ce{Al_2O_3}$
  • $\ce{Al_2Cl_6}$
  • $\ce{AlCl_3}$
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The Correct Option is B

Solution and Explanation

The solution of aluminium chloride in water is acidic due to hydrolysis. $ {AlCl3 + 3H2O -> Al(OH)3 + 3HCl.}$ On heating it till dryness $ { Al(OH)3}$ is converted into $ {Al2O3}$ $ {Al(OH)_3 ->[\Delta] Al_2O_3 + 3H_2 O }$
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Concepts Used:

P-Block Elements

  • P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
  • P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.

P block elements consist of: